Braking mechanism



Patented Mar. 2, 1954 UNITED STATES PATENT OFFICE.v

BRAKING MECHANISM Frank M. Culpepper, Newark; N. J., assignerl to Celanesev Corporation of America, New York, N. .Y.,.a corporation of Delaware Application. J imc 30, 1949 Serial N0. 102,273

4 Claims. l

This invention relates' to a braking mechanism and' relates more particularly to a device, for use With warping machines or other textile machines wherein warp-is supplied from warp beams, for applying a braking force to said. warp beams.

An important objectv of this invention is the provision of an improved device for braking section beams, containing warp yarns, which utilizes the reduction in weight of the section beams, as the yarn is. removed therefrom, to maintain a relatively constant tension on the warp yarns in transit;

Another object of this invention is to provide an. improved braking devicefor applying a braking force on section beams, containing warp yarns, which provides for relatively constantryarn tension at various slasher. speeds without continuous operator attention, and which maintains uniform braking force when the taking-off of yarn is halted.

Still another object of this invention is. to'provide a novel balance systeml between the warp beam-and the brake shoe, whereby the brake shoe applies to said balance system a braking force proportional to the weight of the yarn on the beam.

Other objects of this invention, together with certain details of construction and combinations of parts, will appear from the following detailed description and the appended claims.

In the drawing, the figure is a perspective view of a preferred embodiment of the invention.

Referring now to the drawing, the reference numeral I indicates a suitably supported platform or base, which may be supported on a warp beam creel, to which are fixed bearing members 2 and 3.

A shaft 4, journaled in said bearing members 2 and 3, supports for pivotal movement, the rear end of a U-beam 5 of the balance system. A pillow block 6, preferably of the roller-bearing type, is fixed to said U-beam at a point adjacent to said rear end and has journaled therein the supporting shaft 1 of section beam, or beams, 8.

A brake drum 9 is geared off supporting shaft 1 and is arranged to turn at twelve times section beam speed. The brake drum 9 is provided with a shaft II which is journaled in bearings I2 and I 3 in vertical standards I4 fixed to and supported at their lower ends on base I. The upper ends of standards I4 have attached thereto cross-bars I5 which :are xed to standards I6, also carried 2 and 231 also .attached tostandards I4. Gear I 9 ilreshesv with a gear 24- xed' to'- brake drum shaft The upper ends of standards I6 are each provided with a bearing 25 and a shaft 26 is journaled in said bearings. A beam 21 is fixed to shaft 26 for rotary movement. A brake shoe 28v is supported on the underside of beam 21 in a suitable holder 29' attached tosaid" beam 21 by means of screws 3I. The braker shoe 28- may be of any suitable material, such as` oak wood, molded asbestos brake. lining,V stainless steel sheet stock or brass; sheet stock,` forexanlple.y However, it hasv been found that high speed tool steel is eminentlysuitable foruse aslbrake shoe material. Preferably, thematerialof. thezbrake drum should be slightly harder thanrthefrnaterial of. thebrake shoe, whereby the brake shoev needl be replaced only at long' intervals.

Beams. 51 and 21 are.l operatively connected by means of a rod'. 32. Thus, the connecting rod passes through ay s101133 iii-beam 5, and a shaft 34, passing' through the lower end of the connecting rod'. and' through the-beam, holds the. connecting rod in position and permits pivotal movement thereof. The upper end of the connecting rod 32 is pivotally mounted on a shaft 35 carried in a strap 36, which strap may be moved as desired along the beam 21. By moving the strap 36 along the beam 21, or braking arm, the mechanical advantages of the brake may be varied as desired, i. e. changing the connecting rod position changes the proportion of the braking load applied by the brake shoe to the brake drum due to the weight of the yarn on the section beams.

Pre-loading is necessary to bring the tension on the yarn to the desired degree. To this end, the braking arm 21 is provided with suitable loading weights 31 and counterbalancing weights 38. Loading weights 31 are mounted on a screwthreaded bolt 39. The position of said weights 31 is adjustable along the length of slot 4I in beam 21 in which the head of the bolt 39 is mounted, and held in adjusted position by a nut 42. The counter-weights 38 are supported on a hook 43 removably attached to a link 44, which link is pivotally mounted on a rod 45 carried by a shackle 46. A bar 41 attached to brake arm 21 adjustably supports shackle 46 with its counterbalancing weights.

The foregoing braking mechanism is highly satisfactory since contact with the yarn windings on the beams is avoided, it isv fully automatic with lrespect to providing constant tension at various Slasher speeds in use requiring substantially no attention on the part of the operator, torque re- 3 mains applied when feed of yarn is halted, and it may be easily adjusted so as to be set for yarns of diiierent Weight and for diierent tension.

It is to be understood that the foregoing detailed description is given merely by way of illustration and that may variations may be made therein Without departing from` the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patent is:

1. A braking mechanism for use in a textile machine for applying a braking force to a Warp beam supported on a shaft, in combination, a brake drum, a brake shoe cooperating With said brake drum, a longitudinal beam pivoted at one end thereof for supporting said shaft, a pivotally mounted arm on which said brake shoe is supported, and a connecting rod adjustable along said brake shoe arm operatively joining said longitudinal beam and said brake shoe arm, the construction and arrangement being such that a braking force proportional to the weight of the yarn on the beam is applied by said brake shoe.

2. A braking mechanism for use in a textile machine for applying a braking force to a Warp beam supported on a shaft, in combination, a brake drum, a brake shoe cooperating With said brake drum, a longitudinal beam pivoted at one end thereof for supporting said shaft, a pivotally mounted arm on which said brake shoe is supported, and a pivotally mounted connecting arm adjustable along said brake shoe arm operatively joining said longitudinal beam and said brake shoe arm, the construction and arrangement being. such that a braking force proportional to the Weight of the yarn on the beam is applied by said brake shoe.

3. A braking mechanism for use in a textile machine for applying a braking force to a Warp beam supported on a shaft, in combination, a brake drum, a brake shoe cooperating with said brake drum, a longitudinal beam pivoted at one end thereof for supporting said shaft, a pivotally mounted arm on which said brake shoe is supported, a pivotally mounted connecting arm adjustable along said brake shoe arm operatively joining said longitudinal beam and said brake shoe arm, the construction and arrangement being such that a braking force proportional to the Weight of the yarn on the beam is applied by said brake shoe, and a Weight carried by said brake shoe arm and movable longitudinally of said brake shoe arm for applying a pre-load force on said brake drum.

4. A braking mechanism for use in a textile machine for applying a braking force to a Warp beam supported on a shaft, in combination, a brake drum, a brake shoe cooperating with said brake drum, a longitudinal beam pivoted at one end thereof for supporting said shaft, a pivotally mounted arm on which said brake shoe is 'supported, a pivotally mounted connecting arm adjustable along said brake shoe arm operatively joining said longitudinal beam and said brake shoe arm, the construction and arrangement being such that a braking force proportional to the Weight of the yarn on the beam is applied by said brake shoe, and a plurality of Weights carried by said brake shoe arm and movable relative to said brake shoe arm for applying a pre-load force on said brake drum.

FRANK M. CULPEPPER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 631,430 Perham Aug. 22, 1899 912,942 Draper Feb. 16, 1909 973,344 Cunnii Oct. 18, 1910 1,062,443 Coulombe May 20, 1913 1,103,661 Coulombe July 14, 1914 1,536,047 Arnold May 5, 1925 1,828,918 Balthasar Oct. 27, 1931 2,103,821 Payne Dec. 28, 1937 2,252,419 Slaughter Aug. 12, 1941 2,340,921 Benoit Feb. 8, 1944 

